Path: csiph.com!weretis.net!feeder9.news.weretis.net!border-2.nntp.ord.giganews.com!border-3.nntp.ord.giganews.com!nntp.giganews.com!Xl.tags.giganews.com!local-4.nntp.ord.giganews.com!news.giganews.com.POSTED!not-for-mail NNTP-Posting-Date: Sat, 10 Aug 2024 19:56:32 +0000 From: steve g Newsgroups: gnu.emacs.help Subject: Re: TCO with named-let via macros References: <8734oi5ksx.fsf@axel-reichert.de> Date: Sat, 10 Aug 2024 15:56:32 -0400 Message-ID: <87ikw8jgnj.fsf@gmail.com> User-Agent: Gnus/5.13 (Gnus v5.13) Cancel-Lock: sha1:2FM2ZnUjBaeHgKnb3urDi2nRedI= MIME-Version: 1.0 Content-Type: text/plain Lines: 83 X-Usenet-Provider: http://www.giganews.com X-Trace: sv3-AaLC3fkS7a41Wjxu9rCDJgkKXUDWwTTkh94JsyFhOy0912jFam71V2ciBQVvZ2/U2lCmZ4t5lE6/O/h!X+dgYxy9tmkaUkXLjCpbiUaCc6+jcI7QfmP0dPRS1iz2V30= X-Complaints-To: abuse@giganews.com X-DMCA-Notifications: http://www.giganews.com/info/dmca.html X-Abuse-and-DMCA-Info: Please be sure to forward a copy of ALL headers X-Abuse-and-DMCA-Info: Otherwise we will be unable to process your complaint properly X-Postfilter: 1.3.40 Xref: csiph.com gnu.emacs.help:60990 Richard Smith writes: > Thanks Axel > Regarding the second approach; > I have read > * Paul Graham's "On Lisp" > * Siebel's "Practical Common Lisp" > so have seen things like "gensym" and why has to be so. > > Reality is, with very not-advanced lisp basics I seem to do well. yeah me too :) > > In my world of melting and shaping metal, there seems to be something > good about the working environment of equations and explanations in one > document. It seems to facilitate a person developing their thoughts. I so agree! I thread and weld pipe for fire suppression systems. we use hydraulic calculations; if you can do this you are golden... > > This seems to be the biggest issue - what the environment makes readily > and enjoyably achievable. > > In recent years > > * every beam calculation I want to do > (Euler-Bernoulli beam - derived 1750's; applied eg. Eiffel 1880's-ish) > which I do use frequently in my welding and engineering work > > * a 1-D computer-numerical solution for heat-flow which proves a useful > "nutcracker" for considering what's going on where the issue is > conductive heat transfer Oh yeah! another heat transfer variable :) > > * in mineral processing (considering processing metal ores - tin, > copper, etc) I can run through calculations actually feeling very > happy > > Mineral processing was last new application, a couple of months ago. > I'm surrounded by abandoned mines here - some of the iconic images of > Cornwall. With for me the crucial thing being that tin-mining is > restarting here. There's also lithium here - efforts to work that. > None of these metals "self-extract" from the "run-of-mine" ore. > Hence mineral processing as an expertise. > > Thing is, those happily-done calculations enabled me to see the > twists-and-turns the author, with decades of experience of mineral > processing, could throw at you to get you to think through the issue. > Layers deeper than the text alone could take you. > I had to visualise the minerals and mineral streams, then draw sketches > which were my "model", my boss still uses graphing paper and HGC3 (hydrolic calculator v3). > then derive the maths (concurred with the > author's equations) - then write the elisp functions and get the > answers. > No immediate jobs so having to get back to welding - but could return to > remind of the logical path which worked for me, in those files, whenever. > > These were all "trivial" algebraic expressions, in computing terms. > > I appreciate you showing me > where I could take my computing > if that juncture came. > > Regards, > Rich Smith Thank you!